I saw this recipe on food gawker. It caught my attention because my chive plant was is bloom. I never thought of using the flower for anything. Once I picked them, I smelled them and they had a distinctive chive smell!
The recipe says just put them into vinegar in a jar and shake everyday. Eventually discard the blossoms.
The recipe said you could use whatever vinegar you prefer. I just used some extra plain white vinegar I had in the cupboard and threw it into an old jelly jar.
Here is the results after a few days.
The vinegar takes on a light pink hue. Think I will let it brew a bit longer. The recipe suggested using the vinegar for salad dressings.